Fig. 7. dan danr mutant phenotypes. (A) Wild-type antenna. (B,C) Antennae from danr^ex35 and danr dan^ex56 homozygous mutants. Arrowheads indicate reduced third antennal segments with ectopic bristles. Arrow indicates ectopic bristles on the enlarged basal capsule of the arista. (D) Wild-type arista: basal capsule. (E) Basal capsule of the arista from an eyFlp; FRT82B danr^ex35/FRT82B M⁺ arml^acZ animal. Note the two-segmented appearance and the bracted bristles (arrow). (F) Basal capsule from an eyFlp; FRT82B dan danr^ex56/FRT82B M arml^acZ animal. Note the clear segmentation of the basal capsule and the bracted bristles (arrow). (G,H) Antenna region of eye-antenna discs carrying danr^ex35 or dan danr^ex56 homozygous mutant clones (arrows). Clones were labeled by the absence of ß-gal protein (blue). Danr protein is shown in red; Dan protein in green. (G) Note upregulation of Dan in the Danr mutant clone. (H) Dan and Danr were both absent.